Here’s a helpful guide covering what is, why you might need it, how to obtain it legally, and how to use it—especially for virtualization or older Macs.
Press the while holding down the Option (Alt) key. Release the key when the Startup Manager screen appears. Select the Install macOS High Sierra volume and hit Enter.
: At least 14.3 GB of available storage space to execute the installation.
A standard Mac user typically upgrades their system via the Mac App Store, which downloads a .app installer. However, an ISO file (a standard disk image format) is required for specific deployment scenarios: Macos High Sierra 10.13.6.iso
macOS High Sierra 10.13.6 was the final major update for the High Sierra operating system, acting as a crucial "refinement" release similar to the legacy of Snow Leopard. Key Technical Milestone: APFS
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Are you looking to create a from Windows? Here’s a helpful guide covering what is, why
You have several options to obtain the genuine "Install macOS High Sierra.app" file from Apple:
The Digital Bridge: macOS High Sierra 10.13.6 and the ISO Standard
: Version 10.13.6 represents the absolute peak of optimization for the High Sierra line, containing all accumulated bug fixes, performance improvements, and security patches. Select the Install macOS High Sierra volume and hit Enter
It is surprisingly responsive on older hardware, especially machines with early SSDs that benefit from APFS. Compatibility
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ High\ Sierra.app --nointeraction
The 5.2 GB installer will download and automatically open. When it does, do not continue the installation . Quit the installer. You should now see an application file named Install macOS High Sierra.app in your Applications folder.